Added an integration test for kasko hang reports

chrome/test/kasko/hang_watcher_integration_test.py

 #!/usr/bin/env python
 # Copyright 2015 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
-"""A Windows-only end-to-end integration test for Kasko, Chrome and Crashpad.
+"""A Windows-only end-to-end integration test for the Kasko hang watcher.
 
-This test ensures that the interface between Kasko and Chrome and Crashpad works
-as expected. The test causes Kasko to set certain crash keys and invoke a crash
-report, which is in turn delivered to a locally hosted test crash server. If the
-crash report is received intact with the expected crash keys then all is well.
+This test ensures that Kasko is able to detect when Chrome is hanged and to

[Sigurður Ásgeirsson, 2016/01/11 19:42:58]

is hanged -> hangs
also I think you intend to name the hang watcher rather than Kasko here?

[Patrick Monette, 2016/01/20 17:21:35]

Done.

+generate a report. The report is then delivered to a locally hosted test crash
+server. If a crash report is received then all is well.
 
 Note that this test only works against non-component Release and Official builds

[Sigurður Ásgeirsson, 2016/01/11 19:42:58]

the bulk of this file wants to be reused rather than copied.

[chrisha, 2016/01/12 19:42:15]

I've got a CL in progress which lifts all of the pieces to reusable components
in a module. Maybe wait for that to land and build on top of it?

https://codereview.chromium.org/1582613002/

[Patrick Monette, 2016/01/20 17:21:35]

Done.

 of Chrome with Chrome branding, and attempting to use it with anything else will
 most likely lead to constant failures.
 
 Typical usage (assuming in root 'src' directory):
 
 - generate project files with the following GYP variables:
-    branding=Chrome syzyasan=1 win_z7=0 chromium_win_pch=0
-- build the release Chrome binaries:
+    branding=Chrome kasko=1 kasko_hang_reports=1
+- build the release Chrome binaries and driver:
     ninja -C out\Release chrome.exe
+    ninja -C out\Release chromedriver.exe
 - run the test:
-    python chrome/test/kasko/kasko_integration_test.py --chrome-dir=out/Release
+    python chrome/test/kasko/hang_watcher_integration_test.py
 
 Many of the components in this test could be reused in other end-to-end crash
 testing. Feel free to open them up for reuse, but please CC chrisha@chromium.org
 on any associated reviews or bugs!
 """
 
 import BaseHTTPServer
 import cgi
 import logging
 import os
@@ skipping 489 matching lines @@
 
     # Launch the test server.
     server = _CrashServer()
     with _ScopedStartStop(server):
       _LOGGER.info('Started server on port %d', server.port)
 
       # Configure the environment so Chrome can find the test crash server.
       os.environ['KASKO_CRASH_SERVER_URL'] = (
           'http://127.0.0.1:%d/crash' % server.port)
 
-      # Launch Chrome and navigate it to the test URL.
+      # Launch Chrome and navigate to the hang URL.
       chrome = _ChromeInstance(options.chromedriver, options.chrome,
                               user_data_dir)
       with _ScopedStartStop(chrome):
-        _LOGGER.info('Navigating to Kasko debug URL')
-        chrome.navigate_to('chrome://kasko/send-report')
+        _LOGGER.info('Navigating to the hang debug URL')
+        chrome.navigate_to('chrome://uithreadhang')
 
         _LOGGER.info('Waiting for Kasko report')
-        if not server.wait_for_report(10):
-          raise Exception('No Kasko report received.')
 
-    report = server.crash(0)
-    for key in sorted(report.keys()):
-      val = report[key][0]
-      if (len(val) < 64):
-        _LOGGER.debug('Got crashkey "%s": "%s"', key, val)
-      else:
-        _LOGGER.debug('Got crashkey "%s": ...%d bytes...', key, len(val))
+        # The report can take as long as 80 seconds to be generated because
+        # the polling is done every 60 seconds and the watcher gives 20
+        # seconds to Chrome to ping back before being considered hanged.
+        if not server.wait_for_report(120):
+          raise Exception('No Kasko report received')
 
-    expected_keys = {
-        'kasko-set-crash-key-value-impl': 'SetCrashKeyValueImpl',
-        'guid': 'GetCrashKeysForKasko'}
-    for expected_key, error in expected_keys.iteritems():
-      if expected_key not in report:
-        _LOGGER.error('Missing expected "%s" crash key.', expected_key)
-        raise Exception('"%s" integration appears broken.' % error)
+    _LOGGER.info('Received Kasko report successfully')
+    # TODO(pmonette): Verify that the report contains the expected crash
+    #                 keys when they will work.
 
     return 0
 
 
 if __name__ == '__main__':
   sys.exit(Main())